The problem of surface subsidence under intensive downward influence of artesian waters is considered. Changes in the Lower Kotlin aquifer affecting surface and underground structures in St. Petersburg are characterized. Examples of destruction of structural materials during the construction of transportation tunnels are shown. Recommendations on prevention of corrosiveness of structural materials are given.

The aim of the work is to experimentally study the possibility of reducing the concentrations of polluting components in mine waters of Yakolevsky mine. The physical and chemical processes of fluoride and borate sorption in static and dynamic conditions were studied; recommendations on prevention of river system pollution were developed.